Display panel, display device, and method for manufacturing display panel

Abstract

The present application discloses a display panel, a display device and a method for preparing a display panel, wherein the display area includes a light-emitting area and a non-light-emitting area surrounding the light-emitting area, and the display panel includes: a substrate; at least one auxiliary structure, located in the non-light-emitting area; a light-emitting unit, including a first electrode, a light-emitting layer and a second electrode, wherein the first electrode and the light-emitting layer are located in the light-emitting area, and the second electrode extends from the light-emitting area to the non-light-emitting area and covers at least part of the auxiliary structure; and a power signal line, which is electrically connected to the second electrode covering the non-light-emitting area. In the display panel provided by the embodiment of the present application, the power signal line is electrically connected to the second electrode extending from the light-emitting area to the non-light-emitting area, and at the same time, an auxiliary structure is provided between at least one light-emitting unit in the display panel and the power signal line, and the second electrode covers at least part of the auxiliary structure, so that the water vapor intrusion path is extended, and the packaging performance of the display panel is improved, and the power signal line can be smoothly electrically connected to the auxiliary structure to effectively reduce the voltage drop at the second electrode.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0002] Flat display panels such as Organic Light Emitting Display (OLED) and display panels using light emitting diode (LED) devices have the advantages of high image quality, power saving, thin body and wide application range. They are widely used in various consumer electronic products such as mobile phones, televisions, personal digital assistants, digital cameras, laptops, desktop computers, etc., becoming the mainstream in display devices.

[0003] However, the performance of current display panels still needs to be improved. Summary of the invention

[0004] The embodiments of the present application provide a display panel, a display device, and a method for manufacturing a display panel, which can effectively improve the packaging performance of the electrical connection between the power signal line and the auxiliary structure.

[0005] In the first aspect, according to an embodiment of the present application, a display panel is provided, wherein a display area of ​​the display panel includes a light-emitting area and a non-light-emitting area surrounding the light-emitting area, and includes: a substrate; at least one auxiliary structure located in the non-light-emitting area and arranged on one side of the substrate; a light-emitting unit, arranged on the substrate and including a first electrode, a light-emitting layer, and a second electrode distributed in sequence in a direction away from the substrate, the first electrode being located in the light-emitting area, and the second electrode extending from the light-emitting area to the non-light-emitting area and covering at least part of the auxiliary structure; and a power signal line electrically connected to the second electrode covering the non-light-emitting area.

[0006] According to one aspect of the embodiment of the present application, the auxiliary structure further includes a first auxiliary sub-section and a second auxiliary sub-section, the first auxiliary sub-section is arranged around the second auxiliary sub-section, and the second electrode covers at least part of the first auxiliary sub-section and the second auxiliary sub-section.

[0007] According to one aspect of the embodiment of the present application, the orthographic projection of the first auxiliary sub-portion on the substrate is a closed figure.

[0008] According to one aspect of the embodiment of the present application, the orthographic projection of the second auxiliary sub-portion on the substrate is a circle, and / or the orthographic projection of the first auxiliary sub-portion on the substrate is a ring shape.

[0009] According to one aspect of an embodiment of the present application, the auxiliary structure includes a first isolating portion and a second isolating portion arranged in sequence along a direction close to the substrate, the orthographic projection of the second isolating portion on the substrate is located within the orthographic projection of the first isolating portion on the substrate, the second electrode is provided with a partition opening located at the edge of at least part of the auxiliary structure, the second electrode also includes a second sub-electrode, a fourth sub-electrode and a fifth sub-electrode separated by the partition opening, the second sub-electrode covers at least part of the second auxiliary sub-portion, the fourth sub-electrode is located between the first auxiliary sub-portion and the second auxiliary sub-portion, the fifth sub-electrode extends to the side of the first auxiliary sub-portion away from the second auxiliary sub-portion, and at least one of the second sub-electrode, the fourth sub-electrode and the fifth sub-electrode is electrically connected to the power signal line.

[0010] According to one aspect of an embodiment of the present application, the auxiliary structure further includes a third isolation portion located on a side of the second isolation portion away from the first isolation portion, and an orthographic projection of the second isolation portion on the substrate is located within an orthographic projection of the third isolation portion on the substrate.

[0011] According to one aspect of the embodiment of the present application, the auxiliary structure includes a conductive material, the power signal line and the auxiliary structure are electrically connected to each other, and the second electrode and the auxiliary structure are electrically connected to each other.

[0012] According to one aspect of the embodiment of the present application, the power signal line and the second auxiliary sub-section are electrically connected to each other.

[0013] According to one aspect of the embodiment of the present application, the power signal line is arranged on a side of the auxiliary structure away from the substrate, and the power signal line is electrically connected to the first isolation portion of the second auxiliary sub-portion.

[0014] According to one aspect of the embodiment of the present application, the second sub-electrode further includes at least one via hole penetrating through the second sub-electrode, and the power signal line passes through the via hole and is electrically connected to the first isolation portion of the second auxiliary sub-portion.

[0015] According to one aspect of an embodiment of the present application, the power signal line is electrically connected to the second sub-electrode through a via, or the power signal line is arranged on a side of the auxiliary structure close to the substrate, and the power signal line is electrically connected to the third isolation part of the second auxiliary sub-part.

[0016] According to one aspect of the embodiment of the present application, the fourth sub-electrode and the first auxiliary sub-portion are electrically connected to each other, and / or the fourth sub-electrode and the second auxiliary sub-portion are electrically connected to each other.

[0017] According to one aspect of the embodiments of the present application, the light-emitting layer also includes a first virtual light-emitting portion, which is located on the side of the fourth sub-electrode facing the substrate, and the substrate also includes a recess, the recess including a first recess, the first recess is arranged around at least a portion of the edge of the first auxiliary sub-portion close to the second auxiliary sub-portion, at least a portion of the first virtual light-emitting portion is located in the first recess, the fourth sub-electrode covers the first virtual light-emitting portion and extends to be electrically connected to the third isolation portion of the first auxiliary sub-portion, and / or the first recess is arranged around at least a portion of the edge of the second auxiliary sub-portion, at least a portion of the first virtual light-emitting portion is located in the first recess, the fourth sub-electrode covers the first virtual light-emitting portion and extends to be electrically connected to the third isolation portion of the second auxiliary sub-portion.

[0018] According to one aspect of an embodiment of the present application, the auxiliary structure also includes at least one third auxiliary sub-section, which is arranged to be connected between the first auxiliary sub-section and the second auxiliary sub-section, the third auxiliary sub-section and the first auxiliary sub-section are electrically connected to each other, and / or the third auxiliary sub-section and the second auxiliary sub-section are electrically connected to each other.

[0019] According to one aspect of the embodiment of the present application, the auxiliary structure includes a plurality of third auxiliary sub-sections, and the angle between any two adjacent third auxiliary sub-sections remains consistent and equal.

[0020] According to one aspect of the embodiment of the present application, the auxiliary structure includes four third auxiliary sub-sections, and the angle between any two adjacent third auxiliary sub-sections is 90°.

[0021] According to one aspect of an embodiment of the present application, the second electrode also includes a first sub-electrode covering at least a portion of the first auxiliary sub-portion and a third sub-electrode covering at least a portion of the third auxiliary sub-portion, the third sub-electrode extending to be electrically connected to the first sub-electrode, and / or the third sub-electrode extending to be electrically connected to the second sub-electrode.

[0022] According to one aspect of the embodiment of the present application, the fourth sub-electrode and the third auxiliary sub-portion are electrically connected to each other.

[0023] According to one aspect of an embodiment of the present application, the first recess is also arranged around at least a portion of the edge of the third auxiliary sub-section, at least a portion of the first virtual light-emitting section is located in the first recess, and the fourth sub-electrode covers the first virtual light-emitting section and extends to be electrically connected to the third isolation section of the third auxiliary sub-section.

[0024] According to one aspect of the embodiment of the present application, the fifth sub-electrode and the first auxiliary sub-portion are electrically connected to each other.

[0025] According to one aspect of an embodiment of the present application, the recess also includes a second recess, which is arranged around at least a portion of the edge of the first auxiliary sub-section on a side away from the second auxiliary sub-section, and the light-emitting layer also includes a second virtual light-emitting section extending to the first auxiliary sub-section on a side away from the second auxiliary sub-section, at least a portion of the second virtual light-emitting section is located in the second recess, and the fifth sub-electrode covers the second virtual light-emitting section and is electrically connected to the third isolation section of the first auxiliary sub-section.

[0026] According to one aspect of an embodiment of the present application, the auxiliary structure also includes a supporting pattern connected to the edge of the first auxiliary sub-portion and / or the second auxiliary sub-portion, the second electrode also includes a first sub-electrode covering at least a portion of the first auxiliary sub-portion, and at least two of the first sub-electrode, the second sub-electrode, the fourth sub-electrode and the fifth sub-electrode extend along the surface of the supporting pattern and are electrically connected to each other.

[0027] According to one aspect of an embodiment of the present application, a supporting pattern includes a first supporting pattern, the first supporting pattern includes a first surface away from a side of a substrate, the first surface is connected to a first isolating portion of a first auxiliary sub-portion and the substrate, the first sub-electrode extends along the first surface to be electrically connected to a fourth sub-electrode, and / or the first surface is connected to a first isolating portion of a second auxiliary sub-portion and the substrate, the second sub-electrode extends along the first surface to be electrically connected to a fourth sub-electrode.

[0028] According to one aspect of an embodiment of the present application, the first supporting pattern includes a first sub-pattern arranged along at least a portion of an edge of a first auxiliary sub-portion close to a second auxiliary sub-portion, and a second sub-pattern arranged along at least a portion of an edge of the second auxiliary sub-portion, and the first sub-pattern, the first auxiliary sub-portion, and the second sub-pattern are arranged in sequence along the same direction.

[0029] According to one aspect of an embodiment of the present application, the supporting pattern also includes a second supporting pattern, which is arranged along at least a portion of the edge of the first auxiliary sub-portion away from the second auxiliary sub-portion, and the second supporting pattern includes a second surface away from the side of the substrate, the second surface is connected to the first isolation portion of the first auxiliary sub-portion and the substrate, and the fifth sub-electrode extends along the second surface to be electrically connected to the first sub-electrode.

[0030] According to one aspect of an embodiment of the present application, the supporting pattern includes a first sub-pattern arranged along at least a portion of an edge of a first auxiliary sub-portion close to a second auxiliary sub-portion and a second supporting pattern arranged along at least a portion of an edge of a first auxiliary sub-portion away from the second auxiliary sub-portion, and the second supporting pattern, the first auxiliary sub-portion and the first sub-pattern are arranged in sequence along the same direction.

[0031] According to one aspect of an embodiment of the present application, the display panel also includes a pixel definition layer arranged between the first electrode and the light-emitting layer, the pixel definition layer includes a pixel defining portion and a pixel opening formed by the pixel defining portion, the orthographic projection of the first electrode on the substrate at least partially overlaps with the pixel opening, and the supporting pattern is made of the same material as the pixel definition layer.

[0032] According to one aspect of the embodiments of the present application, the display panel further includes a supporting portion disposed on a side of the pixel definition layer away from the substrate.

[0033] According to one aspect of an embodiment of the present application, the auxiliary structure also includes a conductive film, which covers at least a portion of the first auxiliary sub-section, at least a portion of the second auxiliary sub-section, and at least a portion of the substrate between the first auxiliary sub-section and the second auxiliary sub-section, the power signal line is electrically connected to the conductive film, and the conductive film is electrically connected to the second electrode.

[0034] According to one aspect of the embodiment of the present application, the conductive film includes a second conductive sub-portion, the second conductive sub-portion covers at least a portion of the second auxiliary sub-portion, and the power signal line is electrically connected to the second conductive sub-portion.

[0035] According to one aspect of the embodiment of the present application, the second sub-electrode further includes a via hole penetrating the second sub-electrode, and the power signal line passes through the via hole and is electrically connected to the second conductive sub-portion.

[0036] According to one aspect of the embodiment of the present application, the power signal line is electrically connected to the second sub-electrode through a via hole.

[0037] According to one aspect of the embodiment of the present application, the conductive film further includes a first conductive sub-portion, the first conductive sub-portion covers at least a portion of the first auxiliary sub-portion, and the fifth sub-electrode is electrically connected to the first conductive sub-portion.

[0038] According to one aspect of the embodiment of the present application, the conductive film further includes a third conductive sub-portion, the third conductive sub-portion covers at least a portion of the substrate between the first auxiliary sub-portion and the second auxiliary sub-portion, and the fourth sub-electrode is electrically connected to the third conductive sub-portion.

[0039] According to one aspect of the embodiment of the present application, the substrate further includes a recess, the recess surrounds the edge of the first auxiliary sub-portion and / or the second auxiliary sub-portion, and the conductive film further covers at least a portion of the recess.

[0040] According to one aspect of an embodiment of the present application, the material used to prepare the conductive film includes indium tin oxide.

[0041] According to one aspect of the embodiment of the present application, it further includes at least one electrode flat portion arranged in the light-emitting area, and the orthographic projection of the first electrode on the substrate covers at least a portion of the electrode flat portion.

[0042] According to one aspect of the embodiment of the present application, the electrode flat portion includes an electrode plane away from a side of the substrate and an electrode sidewall arranged around the electrode plane, and the first electrode covers the electrode plane and the electrode sidewall, or the first electrode covers the electrode plane.

[0043] According to one aspect of the embodiment of the present application, the electrode flat portion is made of the same material as the auxiliary structure.

[0044] In a second aspect, according to an embodiment of the present application, a display device is provided, comprising a display panel according to any one of the first aspect embodiments of the present application.

[0045] In a third aspect, according to an embodiment of the present application, a method for manufacturing a display panel is provided, wherein a display area of ​​the display panel includes at least one light-emitting area and a non-light-emitting area surrounding the light-emitting area, including:

[0046] A first functional layer is prepared on one side of the substrate, and the first functional layer is patterned to form an auxiliary structure, wherein the auxiliary structure is located in a non-luminescent area;

[0047] A first electrode layer is prepared on a side of the first functional layer away from the substrate, and the first electrode layer is patterned to form a first electrode, wherein the first electrode is located in the light emitting area;

[0048] Prepare a light-emitting material layer on the side of the first electrode layer away from the first functional layer to obtain a light-emitting layer in the light-emitting area;

[0049] A second electrode layer is prepared on the side of the light-emitting material layer away from the first electrode layer, and a second electrode is obtained in the light-emitting area. The second electrode extends from the light-emitting area to the non-light-emitting area and covers at least part of the auxiliary structure.

[0050] According to one aspect of the embodiment of the present application, before the step of preparing the first functional layer on one side of the substrate, the step further includes:

[0051] preparing a second functional layer, and patterning the second functional layer to obtain a power signal line;

[0052] A first insulating layer is prepared on a side of the second functional layer away from the substrate, and the first insulating layer is patterned to form at least one first through hole.

[0053] According to one aspect of the embodiment of the present application, after the step of preparing the second electrode layer, the step further includes:

[0054] Preparing a second insulating layer on a side of the second electrode layer away from the light-emitting material layer, and patterning the second insulating layer to form at least one second through hole;

[0055] A second functional layer is prepared, and the second functional layer is patterned to obtain a power signal line, wherein the power signal line is electrically connected to a second electrode covering the non-luminous area through a second through hole;

[0056] According to one aspect of an embodiment of the present application, before the step of preparing the second insulating layer, the step further includes:

[0057] The auxiliary structure further includes a first auxiliary sub-section and a second auxiliary sub-section, the first auxiliary sub-section is arranged around the second auxiliary sub-section, and the second electrode covering the second auxiliary sub-section is patterned to form at least one via hole.

[0058] According to one aspect of an embodiment of the present application, the step of preparing a first functional layer on one side of the substrate and patterning the first functional layer to form an auxiliary structure further includes:

[0059] forming an auxiliary structure to be prepared, wherein the auxiliary structure to be prepared comprises a first isolation portion and a second isolation portion sequentially arranged in a direction close to the substrate, wherein an orthographic projection of the second isolation portion on the substrate overlaps with an orthographic projection of the first isolation portion on the substrate;

[0060] The second isolation portion is side-engraved to form an auxiliary structure, and the orthographic projection of the second isolation portion on the substrate is located within the orthographic projection of the first isolation portion on the substrate.

[0061] According to one aspect of the embodiment of the present application, the step of preparing the first electrode layer and the step of preparing the light-emitting material layer further include:

[0062] A pixel definition material layer is prepared on a side of the first electrode layer away from the first functional layer.

[0063] According to one aspect of the embodiment of the present application, the step of side engraving the second isolation portion further includes:

[0064] The pixel definition material layer is patterned to form a pixel definition layer, wherein the pixel definition layer includes a support pattern, a pixel definition portion, and a pixel opening formed by the pixel definition portion.

[0065] According to one aspect of an embodiment of the present application, the step of side engraving the second isolation portion further includes: patterning the first electrode layer to form a first electrode.

[0066] According to one aspect of the embodiment of the present application, the step of preparing the first functional layer further includes:

[0067] A recess is formed on the substrate and surrounds at least a portion of the auxiliary structure.

[0068] According to one aspect of the embodiment of the present application, the step of preparing the first functional layer further includes:

[0069] At least one electrode flat portion is formed, and the electrode flat portion is located in the light emitting area.

[0070] The display panel, display device and method for preparing a display panel provided by the embodiments of the present application, the power signal line is electrically connected to the second electrode extending from the light-emitting area to the non-light-emitting area. At the same time, an auxiliary structure is arranged between at least one light-emitting unit and at least one power signal line in the display panel, and the second electrode covers at least part of the auxiliary structure, so that the invasion path of water vapor can be extended from the electrical connection between the power signal line and the second electrode and along the side of the second electrode close to the substrate to the light-emitting unit, thereby minimizing the risk of water vapor invading the light-emitting layer, improving the packaging performance of the display panel, and the power signal line can be smoothly electrically connected to the auxiliary structure, thereby effectively reducing the voltage drop at the second electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0072] Figure 1 It is a schematic diagram of a planar structure of a display panel provided by an embodiment of the first aspect of the present application;

[0073] Figure 2 yes Figure 1 A schematic diagram of the local enlarged structure of region A;

[0074] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure along the BB direction;

[0075] Figure 4 yes Figure 2 Another schematic diagram of the cross-sectional structure along the BB direction;

[0076] Figure 5 yes Figure 1 Another local enlarged structural schematic diagram of the A region;

[0077] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure along the BB direction;

[0078] Figure 7 yes Figure 1 Another local enlarged structural schematic diagram of the A region;

[0079] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure along the BB direction;

[0080] Fig. 9 yes Figure 7 Schematic diagram of the cross-sectional structure along the CC direction;

[0081] Fig.10 yes Figure 1 Another local enlarged structural schematic diagram of the A region;

[0082] Fig.11 yes Fig.10 Schematic diagram of the cross-sectional structure along the BB direction;

[0083] Fig.12 yes Figure 1 Another local enlarged structural schematic diagram of the A region;

[0084] Fig.13 yes Fig.12 Another schematic diagram of the cross-sectional structure along the BB direction;

[0085] Fig.14 yes Figure 2 Another schematic diagram of the cross-sectional structure along the BB direction;

[0086] Fig.15 is a schematic diagram of the structure of a display device provided by an embodiment of the second aspect of the present application;

[0087] Fig.16 It is a schematic flow chart of a method for preparing a display panel provided in an embodiment of the third aspect of the present application;

[0088] Figures 16a to 16d It is a schematic diagram of the process steps of a method for preparing a display panel provided in an embodiment of the third aspect of the present application;

[0089] Fig.17 It is a schematic flow chart of another method for preparing a display panel provided in an embodiment of the third aspect of the present application;

[0090] Figure 17a to Figure 17b It is a schematic diagram of the process steps of another method for preparing a display panel provided in an embodiment of the third aspect of the present application;

[0091] Fig.18 It is a schematic flow chart of another method for preparing a display panel provided in an embodiment of the third aspect of the present application;

[0092] Figures 18a to 18b It is a schematic diagram of the process steps of another method for preparing a display panel provided in an embodiment of the third aspect of the present application;

[0093] Fig.19 It is a schematic flow chart of another method for preparing a display panel provided in an embodiment of the third aspect of the present application;

[0094] Fig.19a It is a schematic diagram of the process steps of another method for preparing a display panel provided in an embodiment of the third aspect of the present application;

[0095] Fig. 20 It is a schematic flow chart of another method for preparing a display panel provided in an embodiment of the third aspect of the present application;

[0096] Figure 20a to Figure 20b It is a schematic diagram of the process steps of another method for preparing a display panel provided in an embodiment of the third aspect of the present application;

[0097] Fig.21 It is a schematic flow chart of another method for preparing a display panel provided in an embodiment of the third aspect of the present application;

[0098] Figure 21a to Figure 21b It is a schematic diagram of the process steps of another method for preparing a display panel provided in an embodiment of the third aspect of the present application.

[0099] in:

[0100] 100-display panel; AA-display area; EL-luminous area; NL-non-luminous area;

[0101] 10-substrate; 10a-first insulating layer; OP1-first through hole; 10b-second insulating layer; OP2-second through hole; 11-recess; 111-first recess; 112-second recess;

[0102] 20'-first functional layer; 20-auxiliary structure; 21-first auxiliary sub-section; 22-second auxiliary sub-section; 23-third auxiliary sub-section; 20a-first isolation section; 20b-second isolation section; 20c-third isolation section;

[0103] 30-light emitting unit;

[0104] 31'-first electrode layer; 31-first electrode;

[0105] 32'-second electrode layer; 32-second electrode; 320-isolation opening; 321-first sub-electrode; 322-second sub-electrode; H1-via hole; 323-third sub-electrode; 324-fourth sub-electrode; 325-fifth sub-electrode;

[0106] 33'-luminescent material layer; 33-luminescent layer; 331-first virtual luminescent portion; 332-second virtual luminescent portion;

[0107] 40'- second functional layer; 40- power signal line;

[0108] 50-supporting pattern; 51-first supporting pattern; 51a-first sub-pattern; 51b-second sub-pattern; 52-second supporting pattern;

[0109] 60 - conductive film; 61 - first conductive electronic part; 62 - second conductive electronic part; 63 - third conductive electronic part;

[0110] 70'-pixel definition material layer; 70-pixel definition layer; 71-pixel definition portion; 72-pixel opening;

[0111] 80 - electrode flat portion; 81 - electrode plane; 82 - electrode side wall;

[0112] 90-supporting part;

[0113] 1000-display device.

[0114] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0115] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0116] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the display panel and display device of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0117] In the related art, the power line used to provide a reference voltage potential signal in the backplane circuit of the OLED display panel can only be electrically connected to the entire cathode in the display panel in the frame area. In the display area of ​​the display panel, the resistance between the power line and the cathode at the light-emitting unit includes at least: the resistance of the power line itself, the contact resistance of the electrical connection between the power line and the cathode, and the cathode surface resistance.

[0118] Furthermore, in top-emitting medium and large-sized display panels, since the cathode needs to be kept thin to ensure the transmittance of light when passing through the cathode, the cathode is usually made of a transparent material that is evaporated on the entire surface, which is thin and has a large resistance on the entire surface. At the same time, the power line can only be distributed in the frame area. The pursuit of narrow frame by OLED display panels further limits the thickness of the power line. The resistance of the power line is also large, and the contact resistance of the electrical connection area between the power line and the cathode is also large.

[0119] Therefore, the voltage drop of the OLED display panel on the power supply line and the cathode side is relatively large, which limits the peak brightness of the display panel. In addition, for medium and large-sized OLED display panels, the difference between the resistance on the ground power supply line side of the light-emitting unit near the frame area and the resistance on the power supply line side of the light-emitting unit located in the center of the display area increases, and the difference in the voltage drop on the power supply line and the cathode side of the light-emitting unit near the frame area and the light-emitting unit in the center of the display area increases, causing the brightness uniformity of the display panel to also be lost, especially in the low grayscale usage state, the brightness uniformity loss of the display panel is further increased.

[0120] In response to the above technical problems, in the related art, a power routing grid is designed in the display area of ​​the backplane circuit for medium and large-sized OLED display panels to reduce the resistance of the power routing itself. However, when the power routing grid and the cathode are further electrically connected to each other at multiple locations in the display area to further reduce the resistance of the light-emitting unit power routing and the cathode side, a hole needs to be set in the material layer between the power routing grid and the cathode so that the power routing grid or the cathode passes through the hole to form an electrical connection.

[0121] However, the above implementation scheme requires opening corresponding holes near each light-emitting unit, and the risk of external water vapor invading the light-emitting unit along the cathode through the opened holes increases. Therefore, in the related art, the power wiring grid and the cathode cannot be directly electrically connected in the display area, and the power wiring grid and the cathode can only be electrically connected in the frame area, that is, the voltage drop problem caused by the in-plane resistance of the cathode cannot be solved.

[0122] In order to solve the technical problem that the ground power supply line and the cathode cannot be smoothly electrically connected in the display area of ​​the display panel and meet the needs and technical considerations, the embodiments of the present application provide a display panel, a display device and a method for manufacturing the display panel.

[0123] Figure 1 1 shows a planar structure of a display panel 100 provided in an embodiment of the first aspect of the present application. Figure 2 Shows Figure 1 The local enlarged structure of area A, Figure 3 Shows Figure 2 Cross-sectional structure along BB direction.

[0124] See also Figures 1 to 3 In the first aspect, an embodiment of the present application provides a display panel 100, wherein a display area AA of the display panel 100 includes a light-emitting area EL and a non-light-emitting area NL surrounding the light-emitting area EL, and the display panel 100 also includes a substrate 10, at least one auxiliary structure 20, a light-emitting unit 30 and a power signal line 40.

[0125] The auxiliary structure 20 is located in the non-light emitting area NL and is disposed on one side of the substrate 10 .

[0126] The light-emitting unit 30 is disposed on the substrate 10 and includes a first electrode 31, a light-emitting layer 33 and a second electrode 32 distributed in a direction away from the substrate 10. The first electrode 31 and the light-emitting layer 33 are located in the light-emitting area EL, and the second electrode 32 extends from the light-emitting area EL to the non-light-emitting area NL and covers at least part of the auxiliary structure 20.

[0127] The power signal line 40 and the second electrode 32 covering the non-light emitting area NL are electrically connected to each other.

[0128] In the display panel 100 provided by the embodiment of the first aspect of the present application, the power signal line 40 is electrically connected to the second electrode 32 extending from the light-emitting area EL to the non-light-emitting area NL. At the same time, an auxiliary structure 20 is arranged between at least one light-emitting unit 30 and at least one power signal line 40 in the display panel 100, and the second electrode 32 covers at least a portion of the auxiliary structure 20, so that the invasion path of water vapor from the electrical connection between the power signal line 40 and the second electrode 32 and along the side of the second electrode 32 close to the substrate 10 to the light-emitting unit 30 can be extended, thereby minimizing the risk of water vapor invading the light-emitting layer 33, thereby improving the packaging performance of the display panel 100, and the power signal line 40 can be smoothly electrically connected to the auxiliary structure 20, thereby effectively reducing the voltage drop at the second electrode 32.

[0129] The display panel 100 generally includes a display area AA and a non-display area AA arranged around the display area AA. The non-display area AA is also generally referred to as a frame area. At the same time, the display area AA of the display panel 100 is also divided into a light-emitting area EL and a non-light-emitting area NL surrounding the light-emitting area EL. The light-emitting layer 33 for realizing the light-emitting function in the display panel 100 is arranged in the light-emitting area EL, and other structures of the light-emitting layer 33 for assisting the light-emitting area EL are arranged in the non-light-emitting area NL, without interfering with the light-emitting layer 33 to avoid interfering with the light-emitting function, and without blocking the light-emitting area EL to improve the transmittance of light.

[0130] Optionally, the display panel 100 includes a plurality of light-emitting areas EL distributed in an array, and the non-light-emitting areas NL are also formed as a grid-like area that is staggered horizontally and vertically between the light-emitting areas EL.

[0131] The substrate 10 generally includes a substrate and a multi-layer array circuit distributed on one side of the substrate. The array circuit is used to control the light-emitting unit 30. In the bottom-emitting display panel 100, the array circuit is preferably arranged with transparent materials and avoids the light-emitting area EL to further improve the transmittance of light.

[0132] In the light-emitting unit 30, the first electrode 31 is arranged in the light-emitting area EL, and the second electrode 32 extends from the light-emitting area EL to the non-light-emitting area NL. The array circuit in the substrate 10 can be electrically connected to the first electrode 31, and the light-emitting layer 33 located in the light-emitting area EL is stimulated and controlled to emit light through the first electrode 31 and the second electrode 32.

[0133] Optionally, the first electrode 31 is an anode of the light emitting unit 30 in the display panel 100 , and the second electrode 32 is a cathode of the light emitting unit 30 in the display panel 100 .

[0134] For the convenience of explanation, the present application uses the first electrode 31 as the anode of the light-emitting unit 30 and the second electrode 32 as the cathode of the light-emitting unit 30 as an example for explanation in the subsequent embodiments, and will not be repeated in the subsequent embodiments. However, the embodiments of the present application do not limit the correspondence between the first electrode 31 and the second electrode 32 and the cathode and anode of the light-emitting unit 30, as long as the first electrode 31 and the second electrode 32 are provided on both sides of the light-emitting layer 33.

[0135] Optionally, the second electrodes 32 of the plurality of light emitting units 30 extend from the display area AA to the non-display area AA, the second electrodes 32 of different light emitting units 30 are connected, and the second electrodes 32 actually cover the entire display area AA.

[0136] The power signal line 40 is connected to the second electrode 32 . On one side of the second electrode 32 , the power signal line 40 is used to transmit a reference voltage potential signal to the second electrode 32 .

[0137] The second electrode 32 covers the auxiliary structure 20 located in the non-luminous area NL. When the power signal line 40 and the second electrode 32 covering the non-luminous area NL are further electrically connected to each other, for the electrical connection between the power signal line 40 and the second electrode 32 and any one of the light-emitting units 30 in the display panel 100, an auxiliary structure 20 must be arranged between the electrical connection position and the light-emitting unit 30, so as to extend the invasion path of water vapor from the electrical connection along the side of the second electrode 32 close to the substrate 10 to the light-emitting unit 30, thereby minimizing the risk of water vapor invading the light-emitting layer 33 and improving the packaging performance of the electrical connection.

[0138] On this basis, the power signal line 40 can be smoothly electrically connected to the second electrode 32 in the display area AA, thereby reducing the resistance of the second electrode 32 that covers the entire display area AA, thereby effectively reducing the voltage drop at the second electrode 32, and at the same time reducing the difference between the resistance of the second electrode 32 of the light-emitting unit 30 located at different positions in the display area AA and one side of the power signal line 40. Compared with the power signal line 40 being electrically connected to the second electrode 32 from the non-display area AA, the voltage drop difference of the light-emitting unit 30 at different positions in the display area AA is effectively reduced, thereby improving the brightness peak and display uniformity of the display panel 100.

[0139] Optionally, the power signal line 40 forms multiple electrical connections with the second electrode 32 covering the non-luminous area NL in the display area AA, and the power signal line 40 is set as a full-surface grid routing. While reducing the resistance of the power signal line 40, the power signal line 40 and the second electrode 32 are electrically connected at multiple locations in the display area AA, which can further reduce the resistance of the second electrode 32, thereby further effectively reducing the voltage drop at the second electrode 32, and at the same time, can further reduce the difference in resistance between the second electrode 32 of the light-emitting unit 30 located at different positions in the display area AA and one side of the power signal line 40, further effectively reducing the voltage drop difference of the light-emitting unit 30 at different positions in the display area AA, thereby further improving the brightness peak and display uniformity of the display panel 100.

[0140] Please continue reading Figures 2 to 3 In some embodiments, the auxiliary structure 20 further includes a first auxiliary sub-portion 21 and a second auxiliary sub-portion 22 , the first auxiliary sub-portion 21 is arranged around the second auxiliary sub-portion 22 , and the second electrode 32 covers at least part of the first auxiliary sub-portion 21 and the second auxiliary sub-portion 22 .

[0141] In these embodiments, the first auxiliary sub-portion 21 and the second auxiliary sub-portion 22 are continuously arranged between the electrical connection between the power signal line 40 and the second electrode 32 and the light emitting unit 30 in a specific direction, thereby further improving the packaging performance of the electrical connection.

[0142] Optionally, the first auxiliary sub-portion 21 is provided with a break, so that the second electrodes 32 on both sides of the first auxiliary sub-portion 21 can still remain connected.

[0143] Optionally, the first auxiliary sub-section 21 is provided with a plurality of cutouts.

[0144] Optionally, the power signal line 40 and the second electrode 32 between the first auxiliary sub-section 21 and the second auxiliary sub-section 22 are electrically connected to each other, and the first auxiliary sub-section 21 or the second auxiliary sub-section 22 is arranged between the electrical connection between the power signal line 40 and the second electrode 32 and the light-emitting unit 30 .

[0145] Optionally, the power signal line 40 is electrically connected to the second electrode 32 covering the second auxiliary sub-section 22 , and a portion of the second auxiliary sub-section 22 is disposed between the electrical connection point and the light emitting unit 30 .

[0146] Optionally, the power signal line 40 is electrically connected to the second electrode 32 covering the second auxiliary sub-section 22, and part of the second auxiliary sub-section 22 and the first auxiliary sub-section 21 are sequentially arranged between the electrical connection and the light-emitting unit 30. The invasion path of water vapor from the electrical connection along the second electrode 32 close to the substrate 10 to the light-emitting unit 30 is further extended, further avoiding the risk of water vapor invading the light-emitting layer 33, thereby further improving the packaging performance of the display panel 100.

[0147] Optionally, a first auxiliary sub-section 21 and a second auxiliary sub-section 22 are provided between the electrical connection and the light-emitting unit 30, and the invasion path of water vapor from the electrical connection along the second electrode 32 close to the substrate 10 to the light-emitting unit 30 is further extended, thereby further avoiding the risk of water vapor invading the light-emitting layer 33, thereby further improving the packaging performance of the display panel 100.

[0148] Please continue reading Figures 2 to 3 In some optional embodiments, the orthographic projection of the first auxiliary sub-portion 21 on the substrate 10 is a closed figure.

[0149] In these optional embodiments, when the electrical connection between the power signal line 40 and the second electrode 32 is located on the side of the first auxiliary sub-section 21 close to the second auxiliary sub-section 22, it can be achieved that the first auxiliary sub-section 21 exists between the electrical connection and the light-emitting unit 30 in any direction, thereby further avoiding the risk of water vapor invading the light-emitting layer 33, thereby further improving the packaging performance of the display panel 100.

[0150] Please continue reading Figures 2 to 3 In some optional embodiments, the orthographic projection of the second auxiliary sub-section 22 on the substrate 10 is a circle, and / or the orthographic projection of the first auxiliary sub-section 21 on the substrate 10 is a ring.

[0151] In these optional embodiments, the orthographic projection of the first auxiliary sub-section 21 on the substrate 10 is set to a circular ring shape, so that the circumferences of the inner and outer sides of the first auxiliary sub-section 21 are the longest while occupying the same area of ​​the non-luminous area NL, and when the width of the overlapping area between the first auxiliary sub-section 21 and the second electrode 32 is consistent, the area of ​​the overlapping area is the largest, the second electrodes 32 covering different areas are electrically connected to each other through the first auxiliary sub-section 21, and / or the second electrodes 32 covering different areas extend along the first auxiliary sub-section 21 and are electrically connected to each other with the highest success rate.

[0152] Similarly, the orthographic projection of the second auxiliary sub-section 22 on the substrate 10 is set to be a circle, so that the circumference of the second auxiliary sub-section 22 is the longest while occupying the same area of ​​the non-luminous area NL, and when the width of the overlapping area between the second auxiliary sub-section 22 and the second electrode 32 is consistent, the area of ​​the overlapping area is the largest, the second electrodes 32 covering different areas extend along the second auxiliary sub-section 22 and are electrically connected to each other, and / or the success rate of the second electrode 32 and the second auxiliary sub-section 22 being electrically connected to each other is the highest.

[0153] The specific dimensions of the first auxiliary sub-section 21 and the second auxiliary sub-section 22 can be flexibly adjusted in real time according to the manufacturing accuracy of the line width and line spacing of the actual process and the actual available area of ​​the non-luminous area NL, and the embodiments of the present application do not limit this.

[0154] See also Figure 3 In some embodiments, the auxiliary structure 20 includes a first isolation portion 20a and a second isolation portion 20b which are sequentially arranged along a direction close to the substrate 10, the orthographic projection of the second isolation portion 20b on the substrate 10 is located within the orthographic projection of the first isolation portion 20a on the substrate 10, and the second electrode 32 is provided with a partition opening 320 located at the edge of at least part of the auxiliary structure 20, and the second electrode 32 also includes a second sub-electrode 322, a fourth sub-electrode 324 and a fifth sub-electrode 325 separated by the partition opening 320, the second sub-electrode 322 covers at least part of the second auxiliary sub-portion 22, the fourth sub-electrode 324 is located between the first auxiliary sub-portion 21 and the second auxiliary sub-portion 22, the fifth sub-electrode 325 extends from the light-emitting area EL to the side of the first auxiliary sub-portion 21 away from the second auxiliary sub-portion 22, and at least one of the second sub-electrode 322, the fourth sub-electrode 324 and the fifth sub-electrode 325 is electrically connected to the power signal line 40.

[0155] In these embodiments, the hollow structure formed by the first isolation portion 20a and the second isolation portion 20b of the auxiliary structure 20 isolates the second electrode 32 covering the entire display area AA at the electrical connection, and forms an isolation opening 320 on the second electrode 32, so as to divide the second electrode 32 into a second sub-electrode 322, a fourth sub-electrode 324 and a fifth sub-electrode 325 covering different areas, further avoiding the risk of water vapor invading the light-emitting layer 33, thereby further improving the packaging performance of the display panel 100. The power signal line 40 can be electrically connected to at least one of the second sub-electrode 322, the fourth sub-electrode 324 and the fifth sub-electrode 325, so as to also realize the mutual electrical connection between the power signal line 40 and the second electrode 32.

[0156] The isolation opening 320 can divide the second electrode 32 into at least a second sub-electrode 322, a fourth sub-electrode 324, and a fifth sub-electrode 325 covering different regions. The isolation opening 320 is formed between parts of the second electrodes 32 in different regions, and the isolation opening 320 is formed by the shape setting of the first isolation part 20a and the second isolation part 20b of the auxiliary structure 20. Therefore, the isolation opening 320 is located at the edge of at least part of the auxiliary structure 20.

[0157] Although the second sub-electrode 322, the fourth sub-electrode 324 and the fifth sub-electrode 325 are separated by the auxiliary structure 20, the second sub-electrode 322, the fourth sub-electrode 324 and the fifth sub-electrode 325 can still be electrically connected to each other with the help of the second electrode 32 of the region, other additional structures and the auxiliary structure 20 itself, and the reference voltage potential signal is smoothly transmitted to the second electrode 32 located in the light-emitting area EL. The specific implementation method will be described in detail in the following embodiments.

[0158] Optionally, when the power signal line 40 is electrically connected to the second sub-electrode 322, at least the inner hollow structure of the second auxiliary sub-section 22, the inner hollow structure of the first auxiliary sub-section 21 close to the second auxiliary sub-section 22, and the inner hollow structure of the first auxiliary sub-section 21 away from the second auxiliary sub-section 22 are arranged in the water vapor intrusion path. While isolating the second electrode 32, the risk of water vapor invading the light-emitting layer 33 can be further avoided, thereby further improving the packaging performance of the display panel 100.

[0159] Optionally, when the power signal line 40 is electrically connected to the fourth sub-electrode 324, the power signal line 40 can be directly electrically connected to the fourth sub-electrode 324 through other structures of a different layer from the second electrode 32, and at least an inner hollow structure of the first auxiliary sub-section 21 close to the second auxiliary sub-section 22 and an inner hollow structure of the first auxiliary sub-section 21 away from the second auxiliary sub-section 22 are provided in the water vapor intrusion path, which can isolate the second electrode 32 while further avoiding the risk of water vapor invading the light-emitting layer 33, thereby further improving the packaging performance of the display panel 100.

[0160] Optionally, when the power signal line 40 is electrically connected to the fifth sub-electrode 325 , the power signal line 40 may also be directly electrically connected to the fifth sub-electrode 325 via other structures at different layers from the second electrode 32 to ensure packaging performance.

[0161] Figure 4 Shows Figure 2 Schematic diagram of another cross-sectional structure along the BB direction.

[0162] See also Figure 4In some optional embodiments, the auxiliary structure 20 also includes a third isolation portion 20c located on a side of the second isolation portion 20b away from the first isolation portion 20a, and the orthographic projection of the second isolation portion 20b on the substrate 10 is located within the orthographic projection of the third isolation portion 20c on the substrate 10.

[0163] In these optional embodiments, the auxiliary structure 20 includes a first isolation portion 20a, a second isolation portion 20b and a third isolation portion 20c which are arranged in sequence in an I-shaped cross-sectional structure, which can increase the overlapping area between the second electrode 32 and the isolation structure while improving the success rate and further avoiding the risk of water vapor invading the light-emitting layer 33, thereby further improving the packaging performance of the display panel 100.

[0164] See also Figure 4 In some embodiments, the auxiliary structure 20 includes a conductive material, the power signal line 40 and the auxiliary structure 20 are electrically connected to each other, and the second electrode 32 and the auxiliary structure 20 are electrically connected to each other.

[0165] In these embodiments, the power signal line 40 can pass through the second electrode 32 to be directly electrically connected to the auxiliary structure 20, and the auxiliary structure 20 can be electrically connected to the second electrode 32 to transmit the reference voltage potential signal to the second electrode 32 located in the light-emitting area EL, further improving the success rate of electrical connection.

[0166] At the same time, the second electrodes 32 in different regions separated by the auxiliary structure 20 can also be electrically connected to each other through the auxiliary structure 20, further improving the success rate of the electrical connection.

[0167] The auxiliary structure 20 and the second electrode 32 are electrically connected to each other, and the resistance of the second electrode 32 can be further reduced, thereby further reducing the voltage drop and improving the display performance.

[0168] Optionally, multiple auxiliary structures 20 in the display panel 100 are electrically connected to each other in the same layer, and the multiple auxiliary structures 20 form an electrically connected grid, which can further reduce the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0169] Please continue reading Figure 4 In some optional embodiments, the power signal line 40 and the second auxiliary sub-section 22 are electrically connected to each other.

[0170] In these optional embodiments, the power signal line 40 can achieve electrical connection with the second auxiliary sub-section 22 while ensuring optimal packaging performance at the electrical connection, and directly transmit the reference voltage potential signal through the auxiliary structure 20 .

[0171] Please continue reading Figure 4In some optional embodiments, the power signal line 40 is disposed on a side of the auxiliary structure 20 away from the substrate 10 , and the power signal line 40 is electrically connected to the first isolation portion 20 a of the second auxiliary sub-portion 22 .

[0172] In these optional embodiments, when the power signal line 40 is arranged on the side of the auxiliary structure 20 away from the substrate 10, the power signal line 40 is directly electrically connected to the second auxiliary sub-section 22 through the first isolation portion 20a of the second auxiliary sub-section 22. The arrangement of the power signal line 40 is simple, the process steps are easy to implement, and the preparation cost is low.

[0173] Please continue reading Figure 4 In some optional embodiments, the second sub-electrode 322 further includes at least one via hole H1 penetrating through the second sub-electrode 322 , and the power signal line 40 passes through the via hole H1 to be electrically connected to the first isolation portion 20 a of the second auxiliary sub-portion 22 .

[0174] In these optional embodiments, a via H1 is prepared on the second sub-electrode 322 to allow the power signal line to pass through and be electrically connected to the first isolation portion 20a of the second auxiliary sub-portion 22. The process steps are easy to implement and the preparation cost is low.

[0175] Please continue reading Figure 4 In some optional embodiments, the power signal line 40 is electrically connected to the second sub-electrode 322 through the via H1.

[0176] In these optional embodiments, the power signal line 40 can also be electrically connected to the second sub-electrode 322 at the hole wall of the via H1, which can further improve the success rate of electrical connection and further reduce the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0177] Figure 5 Shows Figure 1 Another local enlarged structure of the A region, Figure 6 Shows Figure 5 Cross-sectional structure along BB direction.

[0178] See also Figure 5 and Figure 6 Alternatively, the power signal line 40 is disposed on a side of the auxiliary structure 20 close to the substrate 10 , and the power signal line 40 is electrically connected to the third isolation portion 20 c of the second auxiliary sub-portion 22 .

[0179] In these optional embodiments, when the power signal line 40 is arranged on the side of the auxiliary structure 20 close to the substrate 10, the power signal line 40 is directly electrically connected to the second auxiliary sub-section 22 through the third isolation portion 20c of the second auxiliary sub-section 22. The arrangement of the power signal line 40 is simple, the process steps are easy to implement, and the preparation cost is low.

[0180] See also Figure 4 In some embodiments, the fourth sub-electrode 324 and the first auxiliary sub-portion 21 are electrically connected to each other, and / or the fourth sub-electrode 324 and the second auxiliary sub-portion 22 are electrically connected to each other.

[0181] In these embodiments, the fourth sub-electrode 324 arranged between the first auxiliary sub-section 21 and the second auxiliary sub-section 22 can be electrically connected to at least one of the first auxiliary sub-section 21 and the second auxiliary sub-section 22, which can further improve the success rate of electrical connection and further reduce the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0182] See also Figure 4 In some optional embodiments, the light-emitting layer 33 also includes a first virtual light-emitting portion 331, which is located on the side of the fourth sub-electrode 324 facing the substrate 10, and the substrate 10 also includes a recess 11, which includes a first recess 111, and the first recess 111 is arranged around at least a portion of the edge of the first auxiliary sub-portion 21 on a side close to the second auxiliary sub-portion 22, and at least a portion of the first virtual light-emitting portion 331 is located in the first recess 111, and the fourth sub-electrode 324 covers the first virtual light-emitting portion 331 and extends to be electrically connected to the third isolation portion 20c of the first auxiliary sub-portion 21.

[0183] And / or, the first recess 111 is arranged around at least a portion of the edge of the second auxiliary sub-section 22, at least a portion of the first virtual light-emitting section 331 is located in the first recess 111, and the fourth sub-electrode 324 covers the first virtual light-emitting section 331 and extends to the third isolation section 20c of the second auxiliary sub-section 22 and is electrically connected to each other.

[0184] In these optional embodiments, some functional film layers in the light-emitting layer 33 are also evaporated on the entire surface, and the first virtual light-emitting portion 331 is retained on the side of the fourth sub-electrode 324 facing the substrate 10. The first virtual light-emitting portion 331 can fill the first recess 111 simultaneously etched on the substrate 10 when the auxiliary structure 20 is obtained by patterning, so that the fourth sub-electrode 324 covering the first virtual light-emitting portion 331 can be further extended instead of filling the first recess 111, thereby increasing the overlapping area between the fourth sub-electrode 324 and the first auxiliary sub-portion 21, and / or the second auxiliary sub-portion 22, further improving the success rate of electrical connection, and can also further reduce the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0185] Figure 7 Shows Figure 1 Another enlarged structure of the A region, Figure 8 Shows Figure 7Cross-sectional structure along BB direction.

[0186] See also Figure 7 and Figure 8 In some embodiments, the auxiliary structure 20 also includes at least one third auxiliary sub-section 23, and the third auxiliary sub-section 23 is arranged to be connected between the first auxiliary sub-section 21 and the second auxiliary sub-section 22, and the third auxiliary sub-section 23 and the first auxiliary sub-section 21 are electrically connected to each other, and / or the third auxiliary sub-section 23 and the second auxiliary sub-section 22 are electrically connected to each other.

[0187] In these embodiments, in these embodiments, the third auxiliary sub-section 23 arranged between the first auxiliary sub-section 21 and the second auxiliary sub-section 22 can be electrically connected to at least one of the first auxiliary sub-section 21 and the second auxiliary sub-section 22, which can further improve the success rate of electrical connection while further reducing the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0188] Please continue reading Figure 7 and Figure 8 In some optional embodiments, the auxiliary structure 20 includes a plurality of third auxiliary sub-sections 23, and the angles between any two adjacent third auxiliary sub-sections 23 remain consistent and equal.

[0189] In these optional embodiments, a plurality of third auxiliary sub-portions 23 evenly spaced around the second auxiliary sub-portion 22 can further improve the success rate of electrical connection while further reducing the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0190] Please continue reading Figure 7 and Figure 8 In some optional embodiments, the auxiliary structure 20 includes four third auxiliary sub-sections 23, and the angle between any two adjacent third auxiliary sub-sections 23 is 90°.

[0191] In these optional embodiments, four third auxiliary sub-sections 23 are provided to ensure that the size of the third auxiliary sub-section 23 is as large as possible to reduce the resistance of the second electrode 32, while providing as many third auxiliary sub-sections 23 as possible to further improve the success rate of electrical connection.

[0192] See also Figure 8 In some optional embodiments, the second electrode 32 also includes a first sub-electrode 321 covering at least a portion of the first auxiliary sub-portion 21 and a third sub-electrode 323 covering at least a portion of the third auxiliary sub-portion 23, and the third sub-electrode 323 extends to be electrically connected to the first sub-electrode 321, and / or the third sub-electrode 323 extends to be electrically connected to the second sub-electrode 322.

[0193] In these optional embodiments, the third sub-electrode 323 arranged between the first sub-electrode 321 and the second sub-electrode 322 can be electrically connected to at least one of the first sub-electrode 321 and the second sub-electrode 322, which can further improve the success rate of electrical connection and further reduce the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0194] Fig. 9 Shows Figure 7 Cross-sectional structure along CC direction.

[0195] See also Fig. 9 In some embodiments, the fourth sub-electrode 324 and the third auxiliary sub-portion 23 are electrically connected to each other.

[0196] In these embodiments, the fourth sub-electrode 324 arranged between the first auxiliary sub-section 21 and the second auxiliary sub-section 22 can be electrically connected to the third auxiliary sub-section 23, which can further improve the success rate of electrical connection and further reduce the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0197] Please continue reading Fig. 9 In some optional embodiments, the first recess 111 is also arranged around at least a portion of the edge of the third auxiliary sub-portion 23, at least a portion of the first virtual light-emitting portion 331 is located in the first recess 111, and the fourth sub-electrode 324 covers the first virtual light-emitting portion 331 and extends to the third isolation portion 20c of the third auxiliary sub-portion 23 and is electrically connected to each other.

[0198] In these optional embodiments, the first recess 111 is also arranged around at least a portion of the edge of the third auxiliary sub-portion 23, and the first virtual light-emitting portion 331 can fill the first recess 111 simultaneously etched on the substrate 10 when the auxiliary structure 20 is obtained by patterning, so that the fourth sub-electrode 324 covering the first virtual light-emitting portion 331 can be further extended instead of filling in the first recess 111, thereby increasing the overlapping area between the fourth sub-electrode 324 and the third auxiliary sub-portion 23, further improving the success rate of electrical connection, and can also further reduce the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0199] See also Figure 4 In some embodiments, the fifth sub-electrode 325 and the first auxiliary sub-portion 21 are electrically connected to each other.

[0200] In these embodiments, the fifth sub-electrode 325 disposed on the side of the first auxiliary sub-section 21 away from the second auxiliary sub-section 22 can be electrically connected to the first auxiliary sub-section 21, which can further improve the success rate of electrical connection and further reduce the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0201] Please continue reading Figure 4 In some optional embodiments, the recess 11 also includes a second recess 112, and the second recess 112 is arranged around at least a portion of the edge of the first auxiliary sub-section 21 away from the second auxiliary sub-section 22. The light-emitting layer 33 also includes a second virtual light-emitting portion 332 extending to the side of the first auxiliary sub-section 21 away from the second auxiliary sub-section 22, and at least a portion of the second virtual light-emitting portion 332 is located in the second recess 112. The fifth sub-electrode 325 covers the second virtual light-emitting portion 332 and is electrically connected to the third isolation portion 20c of the first auxiliary sub-section 21.

[0202] In these optional embodiments, a second virtual light-emitting portion 332 is retained on the side of the fifth sub-electrode 325 facing the substrate 10, and the second virtual light-emitting portion 332 can fill the second recess 112 simultaneously etched on the substrate 10 when the auxiliary structure 20 is obtained by patterning, so that the fifth sub-electrode 325 covering the second virtual light-emitting portion 332 can be further extended instead of filling the second recess 112, thereby increasing the overlapping area between the fifth sub-electrode 325 and the first auxiliary sub-portion 21, further improving the success rate of electrical connection, and further reducing the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0203] Fig.10 Shows Figure 1 Another local enlarged structure of the A region, Fig.11 Shows Fig.10 Cross-sectional structure along BB direction.

[0204] See also Fig.10 and Fig.11 In some embodiments, the auxiliary structure 20 also includes a supporting pattern 50 connected to the edge of the first auxiliary sub-portion 21 and / or the second auxiliary sub-portion 22, the second electrode 32 also includes a first sub-electrode 321 covering at least a portion of the first auxiliary sub-portion 21, and at least two of the first sub-electrode 321, the second sub-electrode 322, the fourth sub-electrode 324 and the fifth sub-electrode 325 extend along the surface of the supporting pattern 50 and are electrically connected to each other.

[0205] In these embodiments, the supporting pattern 50 can provide a gentler climbing slope for the second electrodes 32 in different regions at at least part of the edge of the auxiliary structure 20, so that the first sub-electrode 321, the second sub-electrode 322, the fourth sub-electrode 324 and the fifth sub-electrode 325 can extend along the surface of the supporting pattern 50 and form electrical connections with each other, further improving the success rate of electrical connection while further reducing the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0206] Optionally, the auxiliary structure 20 can also be set to an inorganic material, and the inner hollow structure of the first isolation part 20a, the second isolation part 20b and the third isolation part 20c is prepared by stacking inorganic materials. The second electrodes 32 in different regions can bypass the auxiliary structure 20 and achieve mutual electrical connection through the supporting pattern 50, and the auxiliary structure 20 can also play a role of isolation.

[0207] See also Fig.11 In some optional embodiments, the supporting pattern 50 includes a first supporting pattern 51, the first supporting pattern 51 includes a first surface away from the side of the substrate 10, the first surface is connected to the first isolation portion 20a of the first auxiliary sub-portion 21 and the substrate 10, and the first sub-electrode 321 extends along the first surface to be electrically connected to the fourth sub-electrode 324.

[0208] And / or, the first surface is connected to the first isolation portion 20 a of the second auxiliary sub-portion 22 and the substrate 10 , and the second sub-electrode 322 extends along the first surface to be electrically connected to the fourth sub-electrode 324 .

[0209] In these optional embodiments, the setting of the first supporting pattern 51 can make the first sub-electrode 321 and the fourth sub-electrode 324 electrically connected to each other, and / or the second sub-electrode 322 and the fourth sub-electrode 324 electrically connected to each other, which can further improve the success rate of electrical connection and further reduce the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0210] Fig.12 Shows Figure 1 Another local enlarged structure of the A region, Fig.13 Shows Fig.11 Cross-sectional structure along BB direction.

[0211] See also Fig.12 and Fig.13In some optional embodiments, the first supporting pattern 51 includes a first sub-pattern 51a arranged along at least a portion of the edge of the first auxiliary sub-portion 21 close to the second auxiliary sub-portion 22, and a second sub-pattern 51b arranged along at least a portion of the edge of the second auxiliary sub-portion 22, and the first sub-pattern 51a, the first auxiliary sub-portion 21, and the second sub-pattern 51b are arranged in sequence along the same direction.

[0212] In these optional embodiments, when the first supporting pattern 51 includes a first sub-pattern 51a and a second sub-pattern 51b, the first sub-pattern 51a, the first auxiliary sub-portion 21 and the second sub-pattern 51b are arranged sequentially along the same direction, which can maximize the extension of the water vapor intrusion path without increasing the process difficulty, thereby further improving the packaging performance of the electrical connection.

[0213] If water vapor enters the light-emitting area EL along the invasion path of the second electrode 32 connected to the first supporting pattern 51 and close to the side of the substrate 10, by setting the supporting pattern 50 in this way, the invasion path of the water vapor needs to at least surround the second auxiliary sub-part 22 along the fourth sub-electrode 324 for half a circle, thereby maximizing the extension of the invasion path of the water vapor.

[0214] Please continue reading Fig.11 In some embodiments, the support pattern 50 also includes a second support pattern 52, which is arranged along at least a portion of the edge of the first auxiliary sub-portion 21 away from the second auxiliary sub-portion 22, and the second support pattern 52 includes a second surface away from the side of the substrate 10, and the second surface is connected to the first isolation portion 20a of the first auxiliary sub-portion 21 and the substrate 10, and the fifth sub-electrode 325 extends along the second surface to be electrically connected to the first sub-electrode 321.

[0215] In these embodiments, the setting of the second supporting pattern 52 can make the first sub-electrode 321 and the fifth sub-electrode 325 electrically connected to each other, further improving the success rate of electrical connection, and can also further reduce the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0216] Please continue reading Fig.13 In some optional embodiments, the supporting pattern 50 includes a first sub-pattern 51a arranged along at least a portion of the edge of the first auxiliary sub-portion 21 close to the second auxiliary sub-portion 22 and a second supporting pattern 52 arranged along at least a portion of the edge of the first auxiliary sub-portion 21 away from the second auxiliary sub-portion 22, and the second supporting pattern 52, the first auxiliary sub-portion 21 and the first sub-pattern 51a are arranged in sequence along the same direction.

[0217] In these optional embodiments, when the supporting pattern 50 includes a first sub-pattern 51a and a second supporting pattern 52, the second supporting pattern 52, the first auxiliary sub-portion 21 and the first sub-pattern 51a are arranged sequentially along the same direction, which can maximize the extension of the water vapor invasion path without increasing the process difficulty.

[0218] If water vapor enters the light-emitting area EL along the invasion path of the second electrode 32 connected by the second supporting pattern 52 and the first sub-pattern 51a, which is close to the side of the substrate 10, by setting the supporting pattern 50 in this way, the invasion path of the water vapor needs to at least surround the first sub-electrode 321 and the first auxiliary sub-portion 21 for half a circle, thereby maximizing the extension of the invasion path of the water vapor and further improving the packaging performance of the electrical connection.

[0219] See also Fig.11 In some embodiments, the display panel 100 further includes a pixel definition layer 70 disposed between the first electrode 31 and the light-emitting layer 33, the pixel definition layer 70 includes a pixel defining portion 71 and a pixel opening 72 enclosed by the pixel defining portion 71, the orthographic projection of the first electrode 31 on the substrate 10 at least partially overlaps with the pixel opening 72, and the supporting pattern 50 is made of the same material as the pixel definition layer 70.

[0220] In these embodiments, the pixel definition layer 70 and the support pattern 50 can be disposed on the same layer to reduce the difficulty of the process.

[0221] See also Fig.11 In some optional embodiments, the display panel 100 further includes a support portion 90 disposed on a side of the pixel definition layer 70 away from the substrate 10 .

[0222] In these optional embodiments, the support portion 90 can protect the morphology of the light-emitting unit 30 structure and the auxiliary structure 20 that have been prepared, and can support the mask plate in the subsequent process using the evaporation mask plate, thereby protecting the light-emitting unit 30 and the auxiliary structure 20 from being affected by the subsequent process.

[0223] Optionally, the support portion 90 is made of a high-temperature photoresist, and the support portion 90 is obtained by patterning the high-temperature photoresist.

[0224] Fig.14 Shows Figure 2 Another cross-sectional structure along the BB direction.

[0225] See also Fig.14In some embodiments, the auxiliary structure 20 also includes a conductive film 60, which covers at least a portion of the first auxiliary sub-section 21, at least a portion of the second auxiliary sub-section 22, and at least a portion of the substrate 10 between the first auxiliary sub-section 21 and the second auxiliary sub-section 22, the power signal line 40 and the conductive film 60 are electrically connected to each other, and the conductive film 60 and the second electrode 32 are electrically connected to each other.

[0226] In these embodiments, the power signal line 40 can pass through the second electrode 32 to be directly electrically connected to the conductive film 60, and the conductive film 60 can be electrically connected to the second electrode 32 to transmit the reference voltage potential signal to the second electrode 32 located in the light-emitting area EL, further improving the success rate of electrical connection.

[0227] At the same time, the second electrodes 32 in different regions separated by the auxiliary structure 20 can also be electrically connected to each other through the conductive film 60 , further improving the success rate of electrical connection.

[0228] The conductive film 60 and the second electrode 32 are electrically connected to each other, and the resistance of the second electrode 32 can be further reduced, thereby further reducing the voltage drop and improving the display performance.

[0229] See also Fig.14 In some optional embodiments, the conductive film 60 includes a second conductive sub-portion 62 , the second conductive sub-portion 62 covers at least a portion of the second auxiliary sub-portion 22 , and the power signal line 40 is electrically connected to the second conductive sub-portion 62 .

[0230] In these optional embodiments, the power signal line 40 can achieve electrical connection with the second conductive sub-section 62 at the second auxiliary sub-section 22 while ensuring optimal packaging performance at the electrical connection, and directly transmit the reference voltage potential signal through the conductive film 60 .

[0231] See also Fig.14 In some optional embodiments, the second sub-electrode 322 further includes a via hole H1 penetrating the second sub-electrode 322 , and the power signal line 40 passes through the via hole H1 and is electrically connected to the second conductive sub-portion 62 .

[0232] In these optional embodiments, a via hole H1 is prepared on the second sub-electrode 322 to allow the power signal line to pass through and be electrically connected to the second conductive sub-portion 62 of the conductive film 60 . The process steps are easy to implement and the preparation cost is low.

[0233] See also Fig.14 In some optional embodiments, the power signal line 40 is electrically connected to the second sub-electrode 322 through the via H1.

[0234] In these optional embodiments, the power signal line 40 can also be electrically connected to the second sub-electrode 322 at the hole wall of the via H1, which can further improve the success rate of electrical connection and further reduce the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0235] See also Fig.14 In some embodiments, the conductive film 60 further includes a first conductive sub-portion 61 , the first conductive sub-portion 61 covers at least a portion of the first auxiliary sub-portion 21 , and the fifth sub-electrode 325 is electrically connected to the first conductive sub-portion 61 .

[0236] In these embodiments, the first conductive sub-portion 61 is provided to be electrically connected to the fifth sub-electrode 325, thereby realizing electrical connection between the conductive film 60 and the fifth sub-electrode 325, which can further improve the success rate of electrical connection while further reducing the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0237] See also Fig.14 In some optional embodiments, the conductive film 60 further includes a third conductive sub-portion 63 , which covers at least a portion of the substrate 10 between the first auxiliary sub-portion 21 and the second auxiliary sub-portion 22 , and the fourth sub-electrode 324 is electrically connected to the third conductive sub-portion 63 .

[0238] In these optional embodiments, when the third conductive electronic portion 63 is able to realize the routing of the power signal to the second electrode 32 of the light-emitting area EL through the conductive film 60, the fourth sub-electrode 324 is electrically connected to the third conductive electronic portion 63 at the same time, retaining a variety of electrical connection methods, which can further improve the success rate of electrical connection while further reducing the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0239] Optionally, in the above embodiment, the electrical connection method of the power signal line 40 and the electrical connection method of the second electrode 32 in different areas do not conflict with each other, and multiple electrical connection methods can be retained, which can further improve the success rate of electrical connection while further reducing the resistance of the second electrode 32, thereby further reducing the voltage drop and improving the display performance.

[0240] See also Fig.14 In some optional embodiments, the substrate 10 further includes a recess 11 , the recess 11 surrounds the edge of the first auxiliary sub-portion 21 and / or the second auxiliary sub-portion 22 , and the conductive film 60 further covers at least a portion of the recess 11 .

[0241] In these optional embodiments, the conductive film 60 can also protect the morphology of the recess 11 and avoid the risk of the recess 11 being damaged in subsequent process steps.

[0242] In some optional embodiments, the conductive film 60 is made of a material including indium tin oxide.

[0243] In these optional embodiments, indium tin oxide (ITO) can form a relatively thin and dense film, and the film can also play a conductive role.

[0244] See also Figure 4 In some embodiments, the display panel 100 further includes at least one electrode flat portion 80 disposed in the light emitting area EL, and the orthographic projection of the first electrode 31 on the substrate 10 covers at least a portion of the electrode flat portion 80 .

[0245] In these embodiments, the electrode flat portion 80 can play a role of cushioning the first electrode 31 , ensuring the flatness of the first electrode 31 , thereby reducing the resistance of the first electrode 31 as much as possible.

[0246] At the same time, the electrode flat portion 80 can also help transmit the voltage potential signal on one side of the first electrode 31 and protect the substrate 10 .

[0247] See also Figure 4 In some optional embodiments, the electrode flat portion 80 includes an electrode plane 81 away from the side of the substrate 10 and an electrode side wall 82 arranged around the electrode plane 81, and the first electrode 31 covers the electrode plane 81 and the electrode side wall 82, or the first electrode 31 covers the electrode plane 81.

[0248] In these optional embodiments, the first electrode 31 always covers the electrode plane 81 to ensure the flatness of the electrode on the side where the first electrode 31 contacts the light-emitting layer 33 , thereby further reducing the resistance.

[0249] Please refer to the figure, in some optional embodiments, the electrode flat portion 80 is made of the same material as the auxiliary structure 20 .

[0250] In these optional embodiments, the electrode flat portion 80 and the auxiliary structure 20 are provided in the same layer to reduce the difficulty of the process.

[0251] Fig.15 The structure of a display device 1000 provided in an embodiment of the second aspect of the present application is shown.

[0252] See also Fig.15 In a second aspect, an embodiment of the present application provides a display device 1000, comprising a display panel 100 provided by any of the above-mentioned embodiments of the first aspect.

[0253] The display device 1000 provided in the second aspect embodiment of the present application includes the display panel 100 provided in any first aspect embodiment of the present application, and therefore also has the beneficial effects of the display panel 100 provided in any first aspect embodiment of the present application, which will not be elaborated here.

[0254] The display device 1000 in the embodiment of the second aspect of the present application includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, consoles and other devices with display functions.

[0255] Fig.16 A method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application is shown. Figures 16a to 16d The process steps of a method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application are shown.

[0256] See also Fig.16 as well as Figures 16a to 16d In a third aspect, an embodiment of the present application provides a method for manufacturing a display panel 100, wherein a display area AA of the display panel 100 includes at least one light-emitting area EL and a non-light-emitting area NL surrounding the light-emitting area EL, and the method for manufacturing the display panel 100 includes:

[0257] Step S1, preparing a first functional layer 20' on one side of the substrate 10, and patterning the first functional layer 20' to form an auxiliary structure 20, wherein the auxiliary structure 20 is located in the non-luminescent area NL;

[0258] Step S2, preparing a first electrode layer 31' on the side of the first functional layer 20' away from the substrate 10, and patterning the first electrode layer 31' to form a first electrode 31, wherein the first electrode 31 is located in the light emitting area EL;

[0259] Step S3, preparing a light-emitting material layer 33' on the side of the first electrode layer 31' away from the first functional layer 20', and obtaining a light-emitting layer 33 in the light-emitting area EL;

[0260] Step S4 , preparing a second electrode layer 32 ′ on the side of the light-emitting material layer 33 ′ away from the first electrode layer 31 ′, obtaining a second electrode 32 in the light-emitting area EL. The second electrode 32 extends from the light-emitting area EL to the non-light-emitting area NL and covers at least a portion of the auxiliary structure 20 .

[0261] The method for preparing the display panel 100 provided in the third aspect embodiment of the present application can be used to prepare the display panel 100 provided in any first aspect embodiment of the present application, and therefore also has the beneficial effects of the display panel 100 provided in any first aspect embodiment of the present application, which will not be repeated here.

[0262] Fig.17 Another method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application is shown. Figure 17a to Figure 17b The process steps of another method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application are shown.

[0263] See also Fig.17 as well as Figures 17a to 17b In some embodiments, before step S1, the method further includes:

[0264] Step S01, preparing a second functional layer 40', and patterning the second functional layer 40' to obtain a power signal line 40;

[0265] Step S02 : preparing a first insulating layer 10 a on a side of the second functional layer 40 ′ away from the substrate 10 , and patterning the first insulating layer 10 a to form at least one first through hole OP1 .

[0266] In these embodiments, the power signal line 40 can be prepared on the side of the auxiliary structure 20 close to the substrate 10 , and the power signal line 40 passes through the first insulating layer 10 a via the first through hole OP1 and is electrically connected to the auxiliary structure 20 , and the process steps are simple.

[0267] Fig.18 Another method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application is shown. Figures 18a to 18b The process steps of another method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application are shown.

[0268] See also Fig.18 as well as Figure 18a to Figure 18b In some embodiments, step S4 further includes:

[0269] Step S51, preparing a second insulating layer 10b on a side of the second electrode layer 32' away from the light-emitting material layer 33', and patterning the second insulating layer 10b to form at least one second through hole OP2;

[0270] Step S52 , preparing a second functional layer 40 ′, patterning the second functional layer 40 ′ to obtain a power signal line 40 , and the power signal line 40 and the second electrode 32 covering the non-luminous area NL are electrically connected to each other through the second through hole OP2 .

[0271] In these embodiments, the power signal line 40 can be prepared on the side of the auxiliary structure 20 close to the substrate 10 , and the power signal line 40 passes through the second insulating layer 10 b via the second through hole OP2 and is electrically connected to the second electrode 32 , and the process steps are simple.

[0272] Fig.19Another method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application is shown. Fig.19a The process steps of another method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application are shown.

[0273] See also Fig.19 And 19a, in some optional embodiments, before step S51, the method further includes:

[0274] In step S50 , the auxiliary structure 20 further includes a first auxiliary sub-portion 21 and a second auxiliary sub-portion 22 , the first auxiliary sub-portion 21 is disposed around the second auxiliary sub-portion 22 , and the second electrode 32 covering the second auxiliary sub-portion 22 is patterned to form at least one via H1 .

[0275] In these optional embodiments, the power signal line 40 also passes through the second electrode 32 through the via hole H1 and is electrically connected to the second electrode 32 and / or the second auxiliary sub-section 22 , and the process steps are simple.

[0276] Fig. 20 Another method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application is shown. Figure 20a to Figure 20b The process steps of another method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application are shown.

[0277] See also Fig. 20 as well as Figures 20a to 20b In some embodiments, step S1 further includes:

[0278] Step S11, forming an auxiliary structure 20 to be prepared, wherein the auxiliary structure 20 to be prepared includes a first isolation portion 20a and a second isolation portion 20b sequentially arranged in a direction close to the substrate 10, and an orthographic projection of the second isolation portion 20b on the substrate 10 overlaps with an orthographic projection of the first isolation portion 20a on the substrate 10;

[0279] Step S12 , side-carving the second isolation portion 20 b to form an auxiliary structure 20 , wherein the orthographic projection of the second isolation portion 20 b on the substrate 10 is located within the orthographic projection of the first isolation portion 20 a on the substrate 10 .

[0280] In these embodiments, in step S12, the second isolation portion 20b of the auxiliary structure 20 is side-etched to form a hollow structure. Step S12 can be performed simultaneously with subsequent process steps to improve efficiency and reduce process difficulty.

[0281] Optionally, the thickness of the first isolation portion 20 a is 750 angstroms, the thickness of the second isolation portion 20 b is 6000 angstroms, and the thickness of the third isolation portion 20 c is 500 angstroms.

[0282] Fig.21Another method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application is shown. Figure 21a to Figure 21b The process steps of another method for preparing a display panel 100 provided in an embodiment of the third aspect of the present application are shown.

[0283] See also Fig.21 as well as Figures 21a to 21b In some optional embodiments, between step S2 and step S3, the following steps are further included:

[0284] Step S61 : preparing a pixel definition material layer 70 ′ on a side of the first electrode layer 31 ′ away from the first functional layer 20 ′.

[0285] Please continue reading Figures 21a to 21b In some optional embodiments, step S12 further includes:

[0286] In step S62 , the pixel definition material layer 70 ′ is patterned to form a pixel definition layer 70 . The pixel definition layer 70 includes a support pattern 50 , a pixel definition portion 71 , and a pixel opening 72 surrounded by the pixel definition portion 71 .

[0287] In these optional embodiments, after the auxiliary structure 20 to be prepared is prepared, the side engraving step S12 is performed simultaneously with the step S62 of patterning the pixel definition layer 70 , and the second isolation portion 20 b is side engraved simultaneously in step S62 to improve efficiency and reduce process difficulty.

[0288] In step S62, the depth of the side engraving of the second isolation portion 20b can be flexibly adjusted according to the actual process capabilities and technical requirements, and is not limited to this embodiment of the present application. The orthographic projection of the second isolation portion 20b on the substrate 10 can be within the orthographic projection of the first isolation portion 20a on the substrate 10.

[0289] In some optional embodiments, step S12 further includes:

[0290] Step S2 , patterning the first electrode layer 31 ′ to form the first electrode 31 .

[0291] In these optional embodiments, after the auxiliary structure 20 to be prepared is prepared, the side engraving step S12 can also be performed simultaneously with the step S2 of patterning the pixel definition layer 70. In the step S2, the second isolation portion 20b is side engraved simultaneously to improve efficiency and reduce process difficulty.

[0292] In step S2, the depth of the side engraving of the second isolation portion 20b can be flexibly adjusted according to the actual process capabilities and technical requirements, and is not limited in the embodiment of the present application. The orthographic projection of the second isolation portion 20b on the substrate 10 can be within the orthographic projection of the first isolation portion 20a on the substrate 10.

[0293] In some embodiments, step S1 further includes:

[0294] Step S04 , forming a recess 11 on the substrate 10 so as to surround at least a portion of the auxiliary structure 20 .

[0295] In these embodiments, in the step S1 of patterning the first functional layer 20 ′, the substrate 10 is also etched to form the recess 11 , thereby improving efficiency and reducing process difficulty.

[0296] Optionally, the depth of the recess 11 formed by etching is between 1000 angstroms and 3000 angstroms.

[0297] In some optional embodiments, step S1 further includes:

[0298] At least one electrode flat portion 80 is formed, and the electrode flat portion 80 is located in the light emitting region EL.

[0299] In these optional embodiments, in the step S1 of patterning the first functional layer 20 ′, the light emitting area EL is also patterned synchronously to obtain the electrode flat portion 80 , thereby improving efficiency and reducing process difficulty.

[0300] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0301] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, wherein a display area of ​​the display panel comprises a light-emitting area and a non-light-emitting area surrounding the light-emitting area, characterized in that: include: substrate; At least one auxiliary structure, located in the non-luminescent area and disposed on one side of the substrate; a light-emitting unit, disposed on the substrate and comprising a first electrode, a light-emitting layer, and a second electrode sequentially distributed in a direction away from the substrate, wherein the first electrode is located in the light-emitting area, and the second electrode extends from the light-emitting area to the non-light-emitting area and covers at least a portion of the auxiliary structure; The power signal line is electrically connected to the second electrode covering the non-luminous area.

2. The display panel according to claim 1, characterized in that: The auxiliary structure further includes a first auxiliary sub-section and a second auxiliary sub-section, the first auxiliary sub-section is arranged around the second auxiliary sub-section, and the second electrode covers at least a part of the first auxiliary sub-section and the second auxiliary sub-section; Preferably, the orthographic projection of the first auxiliary sub-section on the substrate is a closed figure; Preferably, the orthographic projection of the second auxiliary sub-portion on the substrate is a circle, and / or the orthographic projection of the first auxiliary sub-portion on the substrate is a ring.

3. The display panel according to claim 2, characterized in that: The auxiliary structure comprises a first isolating portion and a second isolating portion which are sequentially arranged in a direction close to the substrate, an orthographic projection of the second isolating portion on the substrate is located within an orthographic projection of the first isolating portion on the substrate, a partition opening which is located at at least a portion of an edge of the auxiliary structure is arranged on the second electrode, the second electrode further comprises a second sub-electrode, a fourth sub-electrode and a fifth sub-electrode which are partitioned by the partition opening, the second sub-electrode covers at least a portion of the second auxiliary sub-portion, the fourth sub-electrode is located between the first auxiliary sub-portion and the second auxiliary sub-portion, the fifth sub-electrode extends to a side of the first auxiliary sub-portion away from the second auxiliary sub-portion, and at least one of the second sub-electrode, the fourth sub-electrode and the fifth sub-electrode is electrically connected to the power signal line; Preferably, the auxiliary structure further comprises a third isolation portion located on a side of the second isolation portion away from the first isolation portion, and an orthographic projection of the second isolation portion on the substrate is located within an orthographic projection of the third isolation portion on the substrate.

4. The display panel according to claim 3, characterized in that: The auxiliary structure includes a conductive material, the power signal line is electrically connected to the auxiliary structure, and the second electrode is electrically connected to the auxiliary structure; Preferably, the power signal line and the second auxiliary sub-section are electrically connected to each other; Preferably, the power signal line is arranged on a side of the auxiliary structure away from the substrate, and the power signal line is electrically connected to the first isolation part of the second auxiliary sub-part; Preferably, the second sub-electrode further comprises at least one via hole penetrating the second sub-electrode, and the power signal line passes through the via hole and is electrically connected to the first isolation part of the second auxiliary sub-part; Preferably, the power signal line is electrically connected to the second sub-electrode through the via hole; Alternatively, the power signal line is arranged on a side of the auxiliary structure close to the substrate, and the power signal line is electrically connected to the third isolation portion of the second auxiliary sub-portion.

5. The display panel according to claim 4, characterized in that: The fourth sub-electrode and the first auxiliary sub-portion are electrically connected to each other, and / or the fourth sub-electrode and the second auxiliary sub-portion are electrically connected to each other; Preferably, the light-emitting layer further includes a first virtual light-emitting portion, the first virtual light-emitting portion is located on a side of the fourth sub-electrode facing the substrate, the substrate further includes a recess, the recess includes a first recess, the first recess is arranged around at least a portion of an edge of a side of the first auxiliary sub-portion close to the second auxiliary sub-portion, at least a portion of the first virtual light-emitting portion is located in the first recess, the fourth sub-electrode covers the first virtual light-emitting portion and extends to be electrically connected to the third isolation portion of the first auxiliary sub-portion, And / or, the first recess is arranged around at least a portion of the edge of the second auxiliary sub-section, at least a portion of the first virtual light-emitting section is located in the first recess, and the fourth sub-electrode covers the first virtual light-emitting section and extends to the third isolation section of the second auxiliary sub-section and is electrically connected to each other.

6. The display panel according to claim 5, characterized in that: The auxiliary structure further includes at least one third auxiliary sub-section, wherein the third auxiliary sub-section is arranged to be connected between the first auxiliary sub-section and the second auxiliary sub-section, the third auxiliary sub-section and the first auxiliary sub-section are electrically connected to each other, and / or the third auxiliary sub-section and the second auxiliary sub-section are electrically connected to each other; Preferably, the auxiliary structure comprises a plurality of the third auxiliary sub-sections, and the angles between any two adjacent third auxiliary sub-sections remain the same; Preferably, the auxiliary structure comprises four third auxiliary sub-sections, and the angle between any two adjacent third auxiliary sub-sections is 90°; Preferably, the second electrode also includes a first sub-electrode covering at least part of the first auxiliary sub-portion and a third sub-electrode covering at least part of the third auxiliary sub-portion, the third sub-electrode extending to be electrically connected to the first sub-electrode, and / or the third sub-electrode extending to be electrically connected to the second sub-electrode.

7. The display panel according to claim 6, characterized in that: The fourth sub-electrode and the third auxiliary sub-portion are electrically connected to each other; Preferably, the first recess is also arranged around at least part of the edge of the third auxiliary sub-section, at least part of the first virtual light-emitting section is located in the first recess, and the fourth sub-electrode covers the first virtual light-emitting section and extends to be electrically connected to the third isolation section of the third auxiliary sub-section.

8. The display panel according to claim 5, characterized in that: The fifth sub-electrode and the first auxiliary sub-portion are electrically connected to each other; Preferably, the recess also includes a second recess, which is arranged around at least a portion of the edge of the first auxiliary sub-portion away from the second auxiliary sub-portion, and the light-emitting layer also includes the second virtual light-emitting portion extending to the first auxiliary sub-portion away from the second auxiliary sub-portion, at least a portion of the second virtual light-emitting portion is located in the second recess, and the fifth sub-electrode covers the second virtual light-emitting portion and is electrically connected to the third isolation portion of the first auxiliary sub-portion.

9. The display panel according to claim 3, characterized in that: The auxiliary structure further includes a supporting pattern connected to an edge of the first auxiliary sub-portion and / or the second auxiliary sub-portion, the second electrode further includes a first sub-electrode covering at least a portion of the first auxiliary sub-portion, and at least two of the first sub-electrode, the second sub-electrode, the fourth sub-electrode and the fifth sub-electrode extend along a surface of the supporting pattern and are electrically connected to each other; Preferably, the supporting pattern includes a first supporting pattern, the first supporting pattern includes a first surface away from the substrate, the first surface is connected to the first isolation portion of the first auxiliary sub-portion and the substrate, the first sub-electrode extends along the first surface to be electrically connected to the fourth sub-electrode, and / or, the first surface is connected to the first isolation portion of the second auxiliary sub-portion and the substrate, and the second sub-electrode extends along the first surface to be electrically connected to the fourth sub-electrode; Preferably, the first supporting pattern includes a first sub-pattern arranged along at least a portion of the edge of the first auxiliary sub-portion on one side close to the second auxiliary sub-portion and a second sub-pattern arranged along at least a portion of the edge of the second auxiliary sub-portion, and the first sub-pattern, the first auxiliary sub-portion and the second sub-pattern are arranged in sequence along the same direction.

10. The display panel according to claim 9, characterized in that: The supporting pattern further includes a second supporting pattern, the second supporting pattern is arranged along at least a portion of an edge of the first auxiliary sub-portion away from the second auxiliary sub-portion, the second supporting pattern includes a second surface away from the substrate, the second surface is connected to the first isolation portion of the first auxiliary sub-portion and the substrate, and the fifth sub-electrode extends along the second surface to be electrically connected to the first sub-electrode; Preferably, the supporting pattern includes the first sub-pattern arranged along at least a portion of the edge of the first auxiliary sub-portion close to the second auxiliary sub-portion and the second supporting pattern arranged along at least a portion of the edge of the first auxiliary sub-portion away from the second auxiliary sub-portion, and the second supporting pattern, the first auxiliary sub-portion and the first sub-pattern are arranged in sequence along the same direction.

11. The display panel according to claim 10, characterized in that: The display panel further includes a pixel definition layer disposed between the first electrode and the light-emitting layer, the pixel definition layer including a pixel definition portion and a pixel opening surrounded by the pixel definition portion, the orthographic projection of the first electrode on the substrate at least partially overlaps with the pixel opening, and the support pattern is made of the same material as the pixel definition layer; Preferably, the display panel further comprises a supporting portion arranged on a side of the pixel definition layer away from the substrate.

12. The display panel according to claim 3, characterized in that: The auxiliary structure further includes a conductive film, the conductive film covers at least a portion of the first auxiliary sub-section, at least a portion of the second auxiliary sub-section, and at least a portion of the substrate between the first auxiliary sub-section and the second auxiliary sub-section, the power signal line is electrically connected to the conductive film, and the conductive film is electrically connected to the second electrode; Preferably, the conductive film comprises a second conductive sub-portion, the second conductive sub-portion covers at least a portion of the second auxiliary sub-portion, and the power signal line is electrically connected to the second conductive sub-portion; Preferably, the second sub-electrode further includes a via hole penetrating the second sub-electrode, and the power signal line passes through the via hole and is electrically connected to the second conductive sub-portion; Preferably, the power signal line is electrically connected to the second sub-electrode through the via hole.

13. The display panel according to claim 12, characterized in that: The conductive film further comprises a first conductive sub-portion, the first conductive sub-portion covers at least a portion of the first auxiliary sub-portion, and the fifth sub-electrode is electrically connected to the first conductive sub-portion; Preferably, the conductive film further comprises a third conductive sub-portion, the third conductive sub-portion covers at least a portion of the substrate between the first auxiliary sub-portion and the second auxiliary sub-portion, and the fourth sub-electrode is electrically connected to the third conductive sub-portion; Preferably, the substrate further comprises a recess, the recess surrounds the edge of the first auxiliary sub-portion and / or the second auxiliary sub-portion, and the conductive film further covers at least a portion of the recess; Preferably, the conductive film is made of a material including indium tin oxide.

14. The display panel according to claim 1, characterized in that: It also includes at least one electrode flat portion disposed in the light-emitting area, wherein the orthographic projection of the first electrode on the substrate covers at least a portion of the electrode flat portion; Preferably, the electrode flat portion includes an electrode plane away from the substrate and an electrode side wall arranged around the electrode plane, and the first electrode covers the electrode plane and the electrode side wall, or the first electrode covers the electrode plane; Preferably, the electrode flat portion and the auxiliary structure are made of the same material.

15. A display device, characterized in that: A display panel comprising any one of claims 1 to 14.

16. A method for preparing a display panel, wherein a display area of ​​the display panel comprises at least one luminous area and a non-luminous area surrounding the luminous area, characterized in that: include: Preparing a first functional layer on one side of the substrate, and patterning the first functional layer to form an auxiliary structure, wherein the auxiliary structure is located in the non-luminescent area; Preparing a first electrode layer on a side of the first functional layer away from the substrate, and patterning the first electrode layer to form a first electrode, wherein the first electrode is located in the light-emitting area; Prepare a light-emitting material layer on the side of the first electrode layer away from the first functional layer to obtain a light-emitting layer in the light-emitting area; A second electrode layer is prepared on a side of the light-emitting material layer away from the first electrode layer to obtain a second electrode in the light-emitting area. The second electrode extends from the light-emitting area to the non-light-emitting area and covers at least a portion of the auxiliary structure.

17. The method for manufacturing a display panel according to claim 16, characterized in that: Before the step of preparing the first functional layer on one side of the substrate, the step further includes: preparing a second functional layer, and patterning the second functional layer to obtain a power signal line; A first insulating layer is prepared on a side of the second functional layer away from the substrate, and the first insulating layer is patterned to form at least one first through hole.

18. The method for preparing a display panel according to claim 16, characterized in that: After the step of preparing the second electrode layer, the following steps are further included: Preparing a second insulating layer on a side of the second electrode layer away from the light-emitting material layer, and patterning the second insulating layer to form at least one second through hole; preparing a second functional layer, and patterning the second functional layer to obtain a power signal line, wherein the power signal line is electrically connected to the second electrode covering the non-luminous area through the second through hole; Preferably, before the step of preparing the second insulating layer, the step further includes: The auxiliary structure further includes a first auxiliary sub-section and a second auxiliary sub-section, wherein the first auxiliary sub-section is arranged around the second auxiliary sub-section, and the second electrode covering the second auxiliary sub-section is patterned to form at least one via hole.

19. The method for preparing a display panel according to claim 16, characterized in that: The step of preparing a first functional layer on one side of the substrate and patterning the first functional layer to form an auxiliary structure also includes: forming an auxiliary structure to be prepared, wherein the auxiliary structure to be prepared comprises a first isolation portion and a second isolation portion sequentially arranged in a direction close to the substrate, wherein an orthographic projection of the second isolation portion on the substrate overlaps with an orthographic projection of the first isolation portion on the substrate; Carving the second isolation portion sideways to form the auxiliary structure, wherein the orthographic projection of the second isolation portion on the substrate is located within the orthographic projection of the first isolation portion on the substrate; Preferably, between the step of preparing the first electrode layer and the step of preparing the light-emitting material layer, the following steps are further included: Preparing a pixel definition material layer on a side of the first electrode layer away from the first functional layer; Preferably, the step of side engraving the second isolation portion further comprises: Performing patterning on the pixel definition material layer to form a pixel definition layer, wherein the pixel definition layer includes a support pattern, a pixel definition portion, and a pixel opening surrounded by the pixel definition portion; Preferably, the step of side engraving the second isolation portion further comprises: patterning the first electrode layer to form the first electrode.

20. The method for preparing a display panel according to claim 16, characterized in that: The step of preparing the first functional layer also includes: forming a recess on the substrate surrounding at least a portion of the auxiliary structure; Preferably, the step of preparing the first functional layer further comprises: At least one electrode flat portion is formed, and the electrode flat portion is located in the light emitting area.

Images